:root {
    --bgcolour: #290B57;
    --sdbarcolour: #481496;
}
body {
    background-color: var(--bgcolour);
    margin:0;
}

#sidebar ul {
    margin: 0;
    padding: 0;
    width:85px;
    background-color: var(--sdbarcolour);
    overflow: auto;
    display: block;
    height:100%;
    position: fixed;
}

#sidebar li a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}

#content {
    margin-left:138px;
    padding: 1px 16px;
}